diff --git a/CHANGELOG.md b/CHANGELOG.md
index bad8fc93f..4a08ebe14 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # CHANGELOG - sitespeed.io
 
+## UNRELEASED
+
+### Added
+* Upgraded to Firefox 67.0 in the Docker container.
+
 ## 9.0.0 - 2019-05-21
 
 ### Added
diff --git a/Dockerfile b/Dockerfile
index 6d7b09ac6..89c4ee5ea 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM sitespeedio/webbrowsers:chrome-74-firefox-66.0.4
+FROM sitespeedio/webbrowsers:chrome-74-firefox-67.0
 
 ENV SITESPEED_IO_BROWSERTIME__XVFB true
 ENV SITESPEED_IO_BROWSERTIME__DOCKER true